Duplicating device for adding machines



W. H. FENN AND 0. E. GROSHELL.

DUPLICATING DEVICE FOR ADDING MACHINES.

APPLICATION FILED SEPT. 11, I920.

1,432,169. Patented 0101.. 17,1922.

2 SHEETSSHEET I.

WITNESS.

ATTORNEY W. H. FENN AND 0. Ea GROSHELL. DUPLICATING DEVICE FOR ADDING MACHINES.

APPLICATION FILED SEPT. II. 1920.

2 2. 92 IT. 9E 7m 14 8 mm 0% 8 &2 m H m P 'ings, whic ,nlachine, B one of the keys, G one, of

Fatented Get. 117 1922.

UNHTED srArss PATENT orator.

'tvrmtrAir H. mm Ann oscA'a n. GROSHELL, or wrmame'rom, nnLAWAnn, Assrenoas ro-mAiturAornRnns CONTRACTING COMPANY, or WILMINGTQN, DELAWARE, A

CORPORATION OF DELAWARE.

-D'UPLICATING DEVICE FOR ADDING MACHINES.

Application filed September 11, 1920.

To all who-m it may concern:

Be it known that we, WILLIAM H. FENN and OsoAn E. GRosHELL, residents of Wilmington, county of New Castle, State of Delaware, both citizens of the United States of America, have invented certain new and useful Improvements in Duplicating Devices for Adding Machines, of which the fol lowing is a true and exact description,referance bein had to the accompanying drawform a part thereof.

' Our invention relates to adding or like computing machines and has for its object to provide in connection with the printing mechanism of such machines simple and efficient mechanism whereby the printing is efiected on two strips of paper, one ofg hich is rolled up on the machine to form a permanent record and the other of which is so fed from the printing mechanism that it can be readily torn 01f in sections.

T he nature of our improvements and their mode of operation will be best understood as described in connection with the drawings in which they are illustrated and in which- Figure 1 is a side elevation showing part of the mechanism of an adding machine of familiar type and our improved duplicating mechanism in operative relation thereto.

Figure 2 is an elevation taken in front of the printing platen and showing the ink ribbon rolls, mechanism for spacing the inking'ribbons, the cut off bar or knife and the front edge of the table over which thepaper strip on which the permanent 'record is formed is fed.

Figure 3 is a similar elevation showing the spacing plate in operative position.

Fi ure 4. is a cross sectional view taken on the line ir-4c of Fig. 3, and

Figure 5 is a plan view of the ribbon rolls and the spacing and tension devices by which the two inking ribbons are held properl taut.

X indicates the framework of the addirlilg t e slide plates supporting a type holding head C and formed as shown with slots C C through which extend guide rods C C for properly aligning the slide. C is the end of a lever by means of which the head C is elevated, C the end of asecond lever having a crossbar C for moving down the several levers C and their attached slides.

seam to. 409,689.

dicates a shoulder on the slide, D D etc, indicate printing type held in the type heads U, E is a shaftv extendingacross the machine and supporting the pivoted levers E E -the arm E of the lever being connected through a link E with a lever E E pivoted on the shaft E"'.. The arm E of the lever-has pivoted upon it the latch lever F F, which is normally slotted and held in engaging position by the action of the spring F attached to the end of the lever arm E and to a lug F of the lever F. G indicates one of the strikers pivoted on the shaft E and having a striking head as indicated at G which registers with the difierent type bars as the printing head moves up an down; the striking lever G has an arm G normally resting against the stop G -through the action of a spring G and having a hook engaging lug G which is normally engaged by the hook lever F.

The above described features of the adding machine are all of well known construc-' tion and form no part of our invention.

H indicates the printing platen which is a roll secured to the shaft H and intermittently actuated through the ratchet wheel H 1 is a lever having a cam 'hea resting in contact with the roller E" at the end of the lever E". This leveris pivoted on a shaft 1 and has a slotted arm 1 through which it is adjustably connected with a bent lever I pivoted on the shaft H and having pivoted to it through the stud I a pawl J having a finger J extending from it and an attached spring J 2 which tends to draw it into contact with the ratchet H lPivotally connected to the lever 1* is the connecting rod K which is also pivotally connected to the rock lever K the shaft K and carrying a spring actuated pawl K which engages a ratchet wheel K and through it actuates the take. up roller K. L L is a lever pivoted on the shaft 1L and carrying a ratchet detent L on its arm 1L and havin attached to its arm L a spring L M, l is a pivoted lever having on its paper roll N N being a latch lever for holding the roll imposition and N indicating pivoted on the platen H and thence rolle'rs indicated tached the levers ated directly through the paper strip from the roller N which passes over the rod L over the front of up over a flat table indicated at P and thence to the take-up roll K. G, O, is a bent lever pivoted on the rod L and carrying a roller 0 on its arm 0 which is pressed against the platen by the action of a spring 0. O is a finger contact on the arm of the lever O by which it can be turned when it is desired to separate the roller 0 from the platen. P is a knife bar located above the platen and in front of and somewhat below the edge of the table Pf Q is a bracket extending out from the 'back'of the machine and supporting the rod Q, which in turn supports the aper roll Q,? from which. the fiaper strip fextends up .over the shaft 3 over the front of the platen and back ofthe knife as shown. B is a ivot stud on which is pivotally supported t such position that the plate can be turned ofl to one side of the platen as shown 'in Fig. 2 or turned u to lie in front of the platen as shown in Tig. 3., The edge R of the plate R is curved so that when the plate is turned up to operative position the two ribbons are spaced apart to give read access to the aper strip Q. The plate is also prefera 1y provided with an arm or finger R having preferably ashoulder R which in turned up position rests against the knife P, the finger extending up in front of and above the table P. S, S, are brackets for supporting the inking ribbon rolls.

These brackets support the roller pivots S and S on WhlCh are journalled the ink'ribbon rolls S; S to which are attached the ratchet wheels-S S. S and S indicate detent. ratchets operating in connection with the ratchets S and S. T, T, indicate arms of the brackets which support spacing at T T T T are spring supporting guide rods indicated at T, T.

,U, are levers pivoted on the rods S and to which are at and carrying arms U actuating the ratchets indicated at U, U. The levers U are ope'ra tlvely connected by a bent bar U and are connected through a pivoted lever U, fU and an actuating lever U connected with movlng parts: of the machine in any convenient way.

In operation the slide C carrying the type ends 0- are moved u and down by the lever C? aetuated by t e keys B each key calling for the registry of one of the vert1calrow oftype' with a head G of, the hammer lever (r. L-The hammer lever'is act-iathe lever E which bemg moved toward t e right transmits motion through the lever E to the lever. E, E pullmg' down on the ratchet lever -F which through the detent G pulls down the lever arm G against the tension of the spring G e spacing plate R in.

ment.

"shit the o erator.

and locates and rocks the hammer lever G backward until the end of the lever F comes in contact with the shoulder C of the slide C when the latch releases the detent G and the hammer springs forward against the type and this 1s the familiar operation of the well known adding machine.

As the lever arm E moves toward the right its end E contacts with the cam end I of the lever I, I, and rocks the bentlever I downward and the pawl J being in englagement with the ratchet H the platen is given a rotative movement. The same movement of the lever I transmits movement through the link K to the lever K on which is pivoted the pawl K which through the ratchet K transmits motion to the takeup rollers K. The link K .has projecting from it a latch or finger K which lies under a finger J attached to the pawl J and coming in contact with it lifts the pawl out of engagement with the ratchet wheel H before the lever I has completed its full move- As a consequence the take-up roller K is fed through a considerably greater are than the platen roller H with the result that the aper extending between the laten roll of tEe take-up roll and the table is kept taut upon the table and is wound up on the take-up roll K. The paper from the roll 3 also passes over the rod L and over the platen roller in front of the pa er stri Niand comes up under the kni e bar against which it is torn off in sections to The in 'ing ribbons t are wound on the spools S, S from each spool they pass above and below a spacing roller T and then over the torsion guide rods T, T, which hold the ribbons in front of the platen.

proper alignment in p The spacingroller and guide rods are so located with reference to the spools as to prevent slack in either of the two ribbons in the space between the rods T,

otion is given to the inking ribbons through a lever U connected with the operative part of the adding machine and giving a reciprocating motion through the crank lever U, U to the bent connecting bar U which gives an oscillating movement to the lever arms U, U, and through arms U and pawls U to the ratchet wheels S at-. tached to the spools. The ratchet wheels and spools are held stationary during the reverse movement of the actuating pawl by the detents S, S. .7

It is a very simple matter to feed the paper strip N up between the platen and the inking ribbon T. It is more diflicult,ihow- 1'25 ever, to fit in a new strip Q between the two inking ribbons and to facilitate this we provide the pivoted spacing and paper guiding plate R with its curved edge R which normally lies in the, position indicated in 130 Fig. 2 in which its curved edge performs a useful function in slightly spacing the two inking ribbons apart. \Vhen it is desired to insert a new strip Q the plate R is turned to the position shown in Figs. 3 and 4 in which position its curved end thrusts the ribbon t upward and provides a clear path between the ribbon t and the inner face of the plate R for the passage of the paper strip, as best shown in Fig. 4. In this position, also, the finger R extends up in front of the table P and affords a convenient resting place for the roll N which it is advisable to detach when inserting a new slip N.

It will be understood that in inserting the paper strips the lever arm 0 is moved toward the left depressing the contact roller "While we have shown and described our invention as applied to a machine having only two inking ribbons and two paper rolls, it will be obvious that it can be applied'to machines having a greater number of inking ribbons and paper rolls and we wish it to be clearly understood that our claims are not to be understood as limiting our invention to machines having not more than two inking ribbons.

Having now we claim as new ters Patent is, I

1. In combination with the printing mechanism of an adding machine means for duplicating the printing comprising two inking ribbons and means for feeding them across the platen, means for feeding paper strips over the platen, including a take up roll on which the strip lying next to the platen is rolled up, a table lying above the platen and between it and said roll over which the said strip passes and a cutter bar lying above the platen and in front of the table for severing sections of the outer paper strip.

2. In combination with the printing mechanism of an adding machine means for dupiieating the printing comprising two inking ribbons and means for feeding them across the platen, means for feeding paper strips over the platen, including a take up roll on which the strip lying next to the platen is rolled up and means for rotating the platen described our invention, what and desire to secure by Letthrough a small arc and the take up roll' through a larger are acting in synchronism with the printing mechanism.

3. In combination with the printing mechanism of an adding machine means for duplicating the printing comprising two inking ribbons and means for feeding them across the platen, means for feeding paper strips over the platen, a spacing plate pivoted to the machine frame and extending between the ribbons and movable from a position in which it lies in front of the platen to one at one side thereof, said plate having a curved edge for spacing the ribbons.

4. In combination with the printing mechanism of an adding machine means for duplicating the printing comprising two inkiL-g ribbons and means for feeding them across the platen, means for feeding paper strips over the platen, including a take up roll on which the strip lying next to the platen is rolled up, a table lying above the platen and between it and said roll over which the said strip passes, a cutter bar lying above the platen and in front of the table for severing sections of the outer paper strip, a spacing pla'te pivoted to the machine frame and extending between the ribbons and movable from a position in which it lies in front of the platen to one at one side thereof, said plate having a curved edge for spacing the ribbons, and a finger which when turned up extends in front of and above the table.

5. In combination with the printing mechanism of an adding machine means for duplieating the printing comprising two ribbon rolls havin two ribbons wound upon them and extending in front of the platen roll, means for maintaining the ribbons in proper tension comprising spacing rolls spaced With respect to the ribbon rolls so as to maintain both ribbons in tension, means for feeding paper strips over the platen and a spacing plate adjustable to and from operative position for spacing the ribbons in front of the platen when the outer paper strip is to be inserted between the ribbons.

WILLIAM H. FENN. OSCAR E. GRUSHELL. 

